Retractor for heart valve surgery



FIG. 1 is a front isometric view of a retractor for heart valve surgery showing our new design, with the blades in an open position.

FIG. 2 is a front elevational view thereof.

FIG. 3 is a right side elevational view thereof.

FIG. 4 is a rear elevational view thereof.

FIG. 5 is a top plan view thereof.

FIG. 6 is a bottom plan view thereof; and,

FIG. 7 is a front isometric view thereof, with the blades in closed position. 

The ornamental design for a retractor for heart valve surgery, substantially as shown and described. 